% Glycol
Low Refrig. Temp
Cutout Solution Freeze Point
°F °C °F °C
Ethylene
0 28.0 -2.2 32 0
5 25.0 -3.9 29 -1.7
10 21.5 -5.8 25.5 -3.6
15 17.5 -8.1 21.5 -5.8
20 12.8 -10.7 16.8 -8.4
25 7.4 -13.7 11.4 -11.4
30 1.1 -17.2 5.1 -15.0
35 -5.0 -20.6 -2.3 -19.1
40 -5.0 -20.6 -10.8 -23.8
45 -5.0 -20.6 -20.7 -29.3
50 -5.0 -20.6 -32.1 -35.6
54 -5.0 -20.6 -42.3 -41.3
Propylene Glycol
0 28.0 -2.2 32.0 0
5 25.3 -3.7 29.3 -1.5
10 22.4 -5.3 26.4 -3.1
15 19.1 -7.2 23.1 -4.9
20 15.3 -9.3 19.3 -7.1
25 10.8 -11.8 14.8 -9.6
30 5.3 -14.8 9.3 -12.6
35 -1.3 -19.5 2.7 -16.3
40 -5.0 -20.6 -5.2 -20.7
45 -5.0 -20.6 -14.6 -25.9
50 -5.0 -20.6 -25.8 -32.1
54 -5.0 -20.6 -36.1 -37.8
Chilled Water Temperature Cutout should be set to 5
°F below the
lowest allowable Chilled Water Set Point bases on the %Glycol.
Installation - Mechanical
54 RTAC-SVX01J-EN
Table 27. Glycol recommendations
Ethylene Glycol
°F 4 6 8 10121416
DT °C 15 -14 -13 -12 -11 -10 -9
Leaving Water Temperature °F (°C)
38 (3)--55556--
34 (1)--11111112 -- --
30 (-1)--15161718-- --
28 (-2) -- 18 18 19 -- -- --
26 (-3) -- 20 21 22 -- -- --
24 (-4) -- 22 23 26 -- -- --
22 (-6)--2426--------
20 (-7)--2630--------
18 (-8)--29----------
16 (-9)--31----------
14 (-10) 30 -- -- -- -- -- --
12 (-11) 32 -- -- -- -- -- --
10.4 (-12) 34 -- -- -- -- -- --
Propylene Glycol
DT
°F 4 6 8 10121416
°C -15 -14 -13 -12 -11 -10 -9
Leaving Water Temperature °F (°C)
38 (3)--66778--
34 (1)--13131517 -- --
30 (-1)--1921--------
28 (-2)--22----------
26 (-3)--25----------
24 (-4)--------------
22 (-6)--------------
20 (-7)--------------
18 (-8)--------------
16 (-9)--------------
14 (-10) -- -- -- -- -- -- --
12 (-11) -- -- -- -- -- -- --
10.4 (-12) -- -- -- -- -- -- --
Notes:
1. These tables represent the MINIMUM RECOMMENDED glycol
percentages for each operating condition
2. Operation is not recommended at certain operating conditions as
some chillers may not satisfy maximum or minimum velocity
requirements or minimum performance requirements. Contact Trane
Sales Representative for more information regarding the operating
limits of a particular chiller.
Table 28. Recommended low evaporator refrigerant
cutout and percent glycol
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